一种什锦糖是由奶糖、水果糖和酥糖按4：3：2的比混合而成的。现

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问题解答题

一种什锦糖是由奶糖、水果糖和酥糖按4：3：2的比混合而成的。现在要配制这种什锦糖720千克，需要奶糖、水果糖、酥糖各多少千克？

答案

奶糖：720×=320（千克）；水果糖：720×=240（千克）；

酥糖：720×=160（千克）

阅读理解

读短文，判断下列句子正误，对的打“√”，错的打“×”。

I have a new friend. Her name is Sue, she lives in the US. Her father works in a hospital. He is a doctor. He

goes to work by car. Her mother is a worker. She works in a factory. She goes to work by bike. Sue and her

brother Jim are all students. She goes to school on foot. Jim does the same. Every evening she listens to music.

Her brother watches cartoons on TV. Sue usually plays at the park on Sunday. Jim usually makes planes.

( ) 1. Sue lives with her family in the US.

( ) 2. Her mother works in a hospital.

( ) 3. Her father goes to work by bike.

( ) 4. Jim likes making planes.

( ) 5. Every evening Sue watches cartoons on TV.

单项选择题

采用“不可剥夺优先数”调度算法，进程在就绪队列中的平均等待时间为______。

A．6

B．7

C．8

D．9